Refrigerating apparatus.



c. & W. A. CHASE. REFRIGBRATING APPARATUS.

APPLIOATION FILED 001. 7, 1907.

1,088,206. Patented Feb. 24, 19m

Wfinesses:

% 25, :3" gfgw lll 2111K UNITED sTA ns PATENT OFFICE.

CONFUCIUS CHASE AND WARREN A. CHASE, OF BOSTON, MASSACHUSETTS, ASSIGNORS TO WILLARD E. ROBINSON, OF WINCHESTER, MASSACHUSETTS.

REFRIGERATING APPARATUS.

Specification of Letters Patent.

Patented Feb. 24, 1914.

Application filed October 7, 1907. Serial No. 396,207.

To all whom it may concern Be it known that we, Conruoms CHASE and \VARREN A. Onset), of Boston, in the bers 2 and 3 for reception of articles ofcounty of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Refrigerating Apparatus, of whic the following is a specification.

Thisinvention' relates to a cooling or re-- frigerating apparatus adapted especially to domestic use, by :which perishable goods ma fillge preserved without the use of ice.

invention consists in an apparatus which produces a low temperatureby. the expansion of previously-compressed, cool and condensed elastic refrigerating .fluid.

The object of the invention is to increase the efliciency of an apparatus of this charac-- ter, to simplify its construction, and to make provlsions for avoiding ill 'effects in case the ap aratus should'get out of orderorits" operatmn should be suspended temporarily or for any other reason.

The details of the apparatus and means by which we accomplish our object are fully described and claimed in the accompanying drawings, in which,-

Figure 1 represents a sectional view of the essential parts. of an apparatus embodying the invention. Fig. 2 represents a fragmentary cross section of the refrigerator or preserving box, taken on line 2-2 of Fig. 1. The same reference characters indicate the same parts in both figures.

Referring to refrigerator, preferably such as is ordinarily employed for domestic use, having chamfood to be preserved, and a. space .4 in its u per. part corresponding to the icechest of the usual refrigerator. The top of the upper chamber is closed by a trap through which ice may be placed in the chamber, if necessary.

Our invent on includes the combination with a domestic refrigerator, of-a mechan ii-x bg' which elastic m yb mcal refri rating apparatus or volati e refrlgerating flui pressed, condensed, and caused 'to expand in a set of cooling pipes within the refrigerator. The cooling pipes are represented at .6, and shown as a coil or'a nest of pipingflin vertical series against one of the lnterior walls of the refrigerator. A great enough length of piping is provided to give suflicient super ficial area for absorption of heat and conthe drawings, 1 represents a densation of moisture from the air contained within the refrigerating chamber.

Preferably the cooling agent is contained in a tank? under pressure furnished by a pump 8. This pump is shown as a handalthough we do not limit ourselves to any top of the coil. The cold flowing water in the tank carries the heat of compression from the refrigerant contained in the coil and reduces the temperature thereof to approximately that of the water. This temperature is kept by the refrigerant under pressure stored in the tank. 7. An outlet 18 is provided at the bottom of the condenser tank for drawing off the water whenever necessary.

From the tank the cooling pipe coil 6, and between this ingthe rate of'flow of the compressed refrigerant to the coil. When a' sufficiently low ressure is maintained in the coil 6, and reigerant under pressure from the tank 7 is allowed-to escape past-thevalve in a fine stream, opportunity-for a gi'freat degree of expansion of'; the fluidisa orded, and in jnsequence, the temperatureof the coil bemesuqwe d to a egree suflicient for the s ratirz e r tosinai tain: a lowpressurein "the .slioil alcbnnection 21 is. provided between the outlet of the latterand the intake of the 3f}, uid noggin-the: coil. Thus the tres the e l e. P p of pressure in the circulating 'flui taining a partlal vacuum, or at least, a sufliciently low. pressure in the coil 6 to permit the desired amount of fallin temperature particular type or character of pump, but

suflicient tobring the water-level above the 7 a connection 19 leads to connection and coil is avalve 20-for regulat-' -8,'so .that the pump draws its supply [providmg a a and mum 60 operated one,.*having a-lever or handle 9,

56 ing to the amount mgof temperature to take place therein. valve 22 controls the outletfrom the coil. J Surrounding the storage tank 7 is a acket, consistingof a double-walled and in sulated tank23 ofsuflicient-size to provide an internal chamber 24 entirely surrounding the tank." Intothis chamber opens a by-pass 25 from the connection 13, which is controlled .by a stop-cock valve may be openedvmore or less to admit a stream of compressed fluid from the pipe 13 at a rate permitting it to expand'and chill the jacket, by which means the temperature of fluid in the tank may be still further reduced. A. pipe 27 may be used when desired to carry'away the jacket fluid, when such fluid is of a nature suitable for thepurposes hereinafter named and to conduct it to the interior of the refgigerator. This pipe may be used as a wa ing or clearing device for displacing warm air operation, and for 25 vso valve 29 connecting with neither loss nor admission of the v m'osphere.

j deg ee 'of compression,

' tank 30 from the interior of the refrigerator when the refrigerating system is first put into of tainted air from time to time thereafter. There need not be constant flow of refrigerating fluid through the jacket 24 and pi e 27,- but such a-flow occurs only when t e cook 26 is opened. In the connection 21 between the outlet of-the coil 6 and the intake of the pump is a pipe 28. adapted to admit the refrigerant. This valve is opened when the apparatus is first put into operation, in order supply of refrigerant to furnish the desired and may be opened from time to time thereafter to make up 1 deficiencies in the "supgfly, or toprovide for.

a greater pressure i desired. however, the valve is kept closed, the ordinary course of operation there is Normally,

ant. 3 Thus the refrigerant trayels in a closed cycle and a pressure maybe'mamtained in the coil 6' less than that of the at- .In the chamber 4 ofthe refrigerator is a containing brine or other liquid having a sufficiently low freezingpoint. A coil 31 of pipes forming part of the expan- 'sion pipe system 6 -is' immersed inlthe liquid n the tank,

' purpose of a block of ice,

and serves to extract heat therefrom and chill thefliquid. Enough heat may be abstracted from the liquid, accordof expansion and lowerinxthe cooling pipe system, to enable the liquid to serve the same temperature in the refrigerator evenii-f-J-the operation of the apparatus is discontiinied and. the flow of refrigerant through. the

pi-pes'ceases; This tank. is supporte on a shelf 32'between which and .the Walls of the refrigerator are spaces when the same or valve 26. This clearii'igv the refrigerator I therein a tank adaptedrto contain to obtain a sufiicientv pressure fluid, and an so that in refrigerwhich water lscaused. to flow,

maintaining a low into andlthrough. which fluid air. The pressure in the storage tank 7 is indicated by a gage 33, while the relief valve 34 is provided torelieve the ressure becomes too great. purge valve 35 is provided in the bottom of the air storage tank 7, and a tap 36 provided for draining the tank 30 of water of condensation,

We claim v 1. In combination with a refrigerator, a cooling pipev in said refrigerator, a fluid compressor, astorage tank into which a refrigerating fluid is forced under pressure by said compressor, which the fluid flows in passing from t e compressor into said tank, a connection between said tank and cooling pipe through which the fluid passes at av rate permitting it to expand in said pipe, a jacket surrounding saidtank, a b -pass from the refrigerant pipe between the condenser and the jacket to said jacket for permitting an expansionof the fluid in the latter to cool the fluid in the tank, and an outlet from the jacket into therefrigerator through which the jacket fluid may pass to displace the warm or tainted air therein.

a condenser throu h' of a preserving box or chamber for containing substances to be preserved, a coil of i 3 n1 under pressure connecte with said coil, a regulating valve permit ing the fluid to pass in an expanded and cooled state into said coil, an insulated chamber surrounding said tank, an inlet to outlet therefrom discharging into the. preserving chamber, whereby the fluid is enabled to chill'the tank and assist in coolingthe preserving chamber. 3. Arefrigeratingapparat'us'for domestic use, consisting of, a pump, and through which fluid forced'by said pump, acondenser, in which said coiled pipe-is contained and through a pressure tank into which the compressed audi -condensed fluidis discharged from theico'iled pipe, an .insulat' tank, aby-pass said jacket and of'fluid thereto, a'preserving box or chamber, a pipe coil contained therein, a connecfrom the pipe openin into -tion to said coil from the tank permitting a restricted flow .offluid thereto, a suction connection from the coil to the intake .of the pump,-and .an outlet from said jacket discharging into said preserving chamber.

'gerating apparatus for domes:

' 4'. A re tic use, consisting of a pump, a coiled pipe under pressure is forced by said pump, a condenser in through which water is caused to flow, a pressure tank into which the compressed said chamber for thea coiled pipe into under pressure is g jacket inclosin'g said permitting a restricte flow which said coiled pipe is contained and.

into said jacket and permitting a restricted flow of fluid thereto,- a preserving box or chamber, a pipe coil contained therein, a connection to said coil from the tank permitting a restricted flow oftfluid thereto a suction connection from the coil to the 1ntake of the pump, and a storage tank for liquid having a low freezing point in whichpart of said coil is contained and whereby it may be chilled to serve as a cooling agent when the apparatus is not in operation.

In testimony-whereof we have afiixed our 15 signatures, inpresence of two witnesses.

doNFUoms' CHASE. WARREN CHASE.

Witnesses:

ARTHUR H. BROWN, EDWARD SEAM. 

